Block Device EFI

This provides a block-device configuration for the vm element to get a single-partition disk suitable for EFI booting on a block device which uses a native 4KiB sector size. This is important because GPT partitioning relies on sector boundry placement and the GPT disk partition table always starts on the second sector of the disk.

Note on x86 this provides the extra BIOS boot partition and a EFI boot partition for maximum compatability.

This element requires mkfs.vfat command to be available on the build system, usually included in the dosfstools OS package.

Furthermore, the sector size created by this element will not be compatible with devices using 512 byte sectors.